Valve-operating mechanism



85 3, w33- N. PERKHNS VALVE @mamme MEGHAMSM Filed April 9, 1950 2,snetsmshem 2 g j iNvaNmR Patented Feb. 3,-l931v i f i Y* i KK UNITEDSTAT.es piifrltJT-11,. CEl

' JOHN nIcrfo'LAsfPERxINs, or -RICHMONDQVIRGIZMA vALvn-ornnniiine`iiiiicifnfiivrsiii Application ined April' 9, 1930. seriainp.' Maele.'v

My invention relates to means for silencing Figure 6 is ahorizontal-section on the line the action of the valve mechanism ofinternal Y 6+6 of Figure 1. v ,combustion engines Vand the likeLa-nd itpar- Figure 7 is an inverted plan of the compcn ticularly has for itsobject to provide a simsating unit. p

M5 ple, inexpensive device'that can readily be Figure 8 is a verticallongitudinal section 50 installed in new'or old engines and will efof amodified form ofamy invention. fectively eliminate noise. L n Figure 9'is a perspective view-of the in- Further, itis an objectto provide meansto ner or compensatingunit'of the form shown take up wear in themovement-transmitting in Figure y l Y is means `that conveys the actionofthe cam Figure 10 is a horizontal'section on the line 55 shaft to thevalve. f 10-10 of'Figure 8.- f f f Further, it is an object of theinvention to In the drawing, inwhich like numeralsfoi provide a deviceto be interposed between the freferenceindicate like parts in allf ofthe iigcam shaft and the .valvewhichfwill maintain ures, 1 representsthe camY shaft, 2 the cani, i5 a continuous uninterrupted metallicconnecand 3. the bearing forthe tappet` llhetap- 6e.

tion between the cam 'shaft' and the valve, pet consists of an outershell 4 having a calnthus enabling the elimination of the clearengagingend 5, in which shell there is located ance space heretofore usuallyleft between the inner or compensating unit. This unit is the valveta-ppet and the valve stem or push composed of the lower section 6having a bore fo rod as the c ase maybe. 7 and a' counterbore 8 `and.being provided e5 l Other objects will lin part be obvious and withconcave ballseats 9 on the faceor end 1n part be pointed'outhereinafter. which opposes the upper section' 10 of the To theattainment of the aforesaid'objects unit. i n Y and ends, the inventionstill further resides The upper section 10 of the unit has a stem T25 inthe novel details of construction, combi- 11 which projects into the'bore 7' andr coun- 7a nation and arrangement of parts, all of whichterbore 8, and it also has a recess 12, the pur- Will be first'ullyvdescribed inthe following pose of which will presently appear. Thedetailed description, then Vbe `particularly stem llhas its endslottedasiat 13 to repointed out in the appended claims, reference ceive oneend of theftorsion spring 15 whose *T30 being had to the accompanyingdrawing, in other end is located in the slotY 14 of the sec- 75 which:Vtion 6. I Y, Y

Figure l is. averticallongitudinal section A cross .pin 16 carried bythe section GeX- illustrating one embod'iin'entzof the invention, tendsinto the slot112 and serves as a stop te the parts being in the positiontheyassume limitswivelling motion of the sections 6 and V^ -.35 when thecam has raised the tappet to hold 10 on their common aXis with respectone to se the valve open. y theV other. Theupper vsection 10 has -con-"Figure 2 is a similar View with thepa'rts cave ball seats 17 ,andcarries anadjusting), in the position they assume when the valve screw18 whose head 19 is adaptedto contact S ClOSGd-V l Y the valve stein 21y (or push rod as .the case, 40 Figure 3 is a perspective .view oftheinnerl may be)the adJusting screw 18Vbeing held, 85

or compensating unit. by a ]am nut 20.

Figure 4 is a horizontal section on the line 22, designates ballslocated between `the 4-4of Figure 1. f v concave ballV seats 9 and 1 7respectively and Y Figure 5is a horizontal section on the linecontinuously lying in contact with said seats.

. 5 5 5 of Figure 2. f In the embodiment of the invention illus 90 onits vlongitudinal axis.

trated in Figures 6 to 8 inclusive, it will be seen that the inner unitis composed ot the lower section 23 having Vconcave ball seats 24 and abore 25, while the upper section 26 has lugs 27 provided with concaveball seats 28, the spaces 29 between-the lugs 27 permitting theproyectionoic pins 8O carried on .the lower section 23 Vand cooperating`with th pins to limit the rotational or swivelling motion of thesections 23 and 26 on theircoinmon axis with relation one to the other.

The upper section 26 also has a recess 3l in which and in theboie 25 atorsion spring 33 lies, the spring having its ends anchored to therespective sections 23 and 26 by Ypins Balls 34: lie between the.concave seats 24 and 28 respectively and arein Continuous contacttherewith. The uppersection 26 of the inner unit is tapped at 35 fertile'reception of thefusual adjusting screw 18,-the construction of whichmay be `the saine' as the preceding embodiment oi the invention, as mayalso be the construction of the. inem- 'ber li.

[n both embodiments of the invention it will be observed that the innerunit is Aiitted into the shell 4 and rests onthe bottom 5, the innerunit being free to turn in the shell In both embodiments of theinvention also it will .be observed that the ball seats of the upper andlower sections are struck on a radius of greater lengthjthan theradiusof the balls 22 or 34 as the case may ybeso that the seats 9, 17 or 24,28 as the-case may be, operate in connection with the balls as cammingelements,` maintaining` a metallic thread connection between the yupperand lower sections of the yinner unit- `while permitting those sectionsto move along the direction or their common axis .toward and from oneanother to compensate for the expansion and contraction and for any lagin movement ofk the parts of the valve operating mechanism, therebymaintaining a continuous metallic train of elements from the cani shaftto the valve itseli and eliminating the tap due to metallic contactbetween parts for clearance now so common'- in internal combustionengines. A

Fromthe foregoing description, taken in connection with the accompanyingdrawing, it is thought the construction, operation and d-.vantages ot myinvention will be clear to those skilled in the art to which it relates,and I desire it understood that slight changes in the details o'construction may be .without departing from the spirit of the inventionor the scope of the appended claims.

` What I claim is: e r

l. ln valve mechanism wherein is provided a valve and an actuating camshaft, anda connection between said valve and cam shaft; said connectionincluding a tubular saidV .inner unit comprising two axially alignedsections, a torsionsprlng connecting vsaid's'edtions,means limiting themovement oil onesection relatively to the other under vthe influence ofsaid spring, and continuous-v ly'engaged .cam connections between theopposingends of said sections, said cam con- "ne'ctions comprisingopposed concavev seats on the adjacent ends of said sections and ballslocated between said seats.

3. In valve mechanism wherein is provided a. cam shaft and a valve; 1anoperating connection between the same which includes an outer tubularmember closed at one end, an

'inner unit fitted within'said member 'to seat on said-closed end,saidvinner unit comprising two axially aligned sections rotatable ontheir common axis as a unit in said ltubular member and having Vlimitedrotation relatively one tothe other, means continuously tending to turnsaid sections relatively yone to the other in one direction, and.camming elements between said sections for rmoving them along theircommon axis away from one 'another under the action of said continuouslytending means, said camming elements maintaining a contact continuitybetween lthe ends of all sections at all times for the v purposesspecified,

4. Invalve mechanism wherein is provid- 'edi a-Jca'm' shaft and a valve;an operating connection between the same which includes an outer tubularmember closed at one end, an'inner unit iitted within said member toseat on said closed end, saidinner unit comprising two axially alignedsections rotatable on their common axis as a unit in .said tubularmember andhaving limited rotation relatively one to the othermeanscontinuously tending to turn said sections relatively one totheother in one direction, and camming elements between said sectionsforv moving them along their common axis awayirom one another under theaction of said continuously tending means, said camming elementscomprising opposed concave seats on said sections and bearing balls insaid seats.

5. ln a valve mechanism wherein is provided-a cam shaft and a valve; anoperating connection between the same which includes a tappet comprisinga shell, an inner'unit slidably and swivelly fitted withinthe shell,

said shell having a bottom on whichsaid unit rests, said unit comprisinga plurality oi v axially aligned sections, one having a stem and theother having a passage to receive said y stem, a torsion spring in saidother sectionv having one end anchored'to Said other section and itsother end anchored to said stem,

means to limit the swivelling action of said sections on their commonaxls under theinfiuence of said spring, the opposing faces of saidsections having concave ball seats and balls in said seats.

JOHN NICHOLAS PERKINS.

